Flights from London to Seattle Tacoma

Our cheapest offers for flights from London to Seattle Tacoma

Here you can compare cheap flights from London (LON) to Seattle Tacoma (SEA) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Seattle Tacoma. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£409
Best option
London
Seattle-Tacoma
Outbound
16/12/25
direct
BA0053
10h 05min
Return
13/01/26
direct
BA0048
09h 30min
British Airways
£537
London
Seattle-Tacoma
Outbound
29/12/25
1 Stopover (FRA)
LH0917, LH0490
25h 40min
Return
15/01/26
1 Stopover (YYZ)
AC0542, AC0856
16h 15min
Lufthansa
£1,097
London
Seattle-Tacoma
Outbound
23/01/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
31/01/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£411
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£418
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair ?
£420
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£439
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0451, FI0681
12h 45min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0454
20h 55min
Icelandair
£444
London
Seattle-Tacoma
Outbound
23/01/26
1 Stopover (MUC)
LH2485, LH0488
14h 45min
Return
31/01/26
1 Stopover (SFO)
UA0643, UA0901
16h 20min
Lufthansa ?
£477
London
Seattle-Tacoma
Outbound
19/02/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
22/02/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair ?
£490
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from London to Seattle Tacoma

Favourite airline: Icelandair
The most popular airline for flights from London to Seattle-Tacoma is Icelandair.
Icelandair
50 %
Turkish Airlines
18 %
British Airways
10 %
Stopover flights are the cheapest connection
Direct flights on this route are £454.00 more expensive on average than flights with a stopover.
non stop flight
1 stop
2 stops
09h 45min
15h 35min
17h 30min
973 £GB
519 £GB
1 330 £GB
Favourite connection: via Reykjavik-Keflavik
Stopover flights on this route are especially popular via Reykjavik-Keflavik, making up 54 % of bookings.
Route
bookings
1 stopover Reykjavik-Keflavik International
15h 35min, from 519 £GB
54 %
1 stopover Istanbul
32h 05min, from 891 £GB
19 %
Direct flights
09h 45min, from 973 £GB
16 %

Important flight information

Flight information: London - Seattle-Tacoma

Outbound and return from 408,99 £GB
Flight duration min. 09:50 / max. 09:55
Return flight duration min. 09:20/ max. 09:30
Distance 7721 km
Flights per week 19
Departure airport Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport Airport Seattle-Tacoma (SEA)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Seattle-Tacoma
Flight destinations with a similar price